I'm just hitting the same issue... I think from what you said that for my email to go at 10am tomorrow morning I need to set it to 10am GMT (London) ... even though it's actually 10am BST (and 9am GMT)...(?!?!?!)

It's a good question, and tobystokes actually hit this nail right on the head. If you pick the correct city, CM will sort out the local daylight saving variations for you.

That's why, for example, you'll find that under GTM+10:00 there are three different Aussie zones: "Brisbane", "Hobart", and "Canberra, Melbourne, Sydney". Even though they're all eastern Australian cities, they have different daylight savings start/end dates and so are grouped accordingly.

I think it should somehow be a bit clearer therefore...to me, and I would assume most people, GMT (Greenwich Mean Time) means UTC so looking at the dropdown I would immediately assume that it would go one hour earlier than it actually does during the summer. Or maybe just a message is needed next to that to say that daylight saving is accounted for?In addition, therefore, it would be useful to have a true GMT/UTC option - I could see this being useful if you're sending to people in multiple countries and have agreed to send it at a certain time GMT.ThanksJames